I think to know for positive, one has to really look at the upper surface of the wings, at least according to what I've been researching.
Here are 2 sources of info.; 1 for each
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown